<template>
	<view>
		<!-- 使用自定义的搜索组件,其中bgcolor使用单引号是为了表示是字符串，匹配String类型 -->
		<!-- <my-search :bgcolor="'pink'" :radius="3"></my-search> -->
		<my-search @click="gotoSearch()"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧的滑动区域 -->
			<scroll-view scroll-y="true" :style="{height: wh+'px'}" class="left-scroll-view" >
				<block v-for="(item,index) in cateList" :key="index">
					<view :class="['left-scroll-view-item',index===active?'active':'']" @click="activeChanged(index)">
						{{item.cat_name}}
					</view>
				</block>
				
			</scroll-view>
			<!-- 右侧的滑动区域 -->
			<scroll-view scroll-y="true" :style="{height: wh+'px'}" :scroll-top="scrollTop">
			<view class="cate-lv2" v-for="(item2,index2) in cateLeve2" :key="index2">
				<!-- 二级标题 -->
				<view class="cate-lv2-title">
					/{{item2.cat_name}}/
				</view>
				<!-- 二级分类的具体品牌 -->
				<view class="cate-lv3-list">
					<!-- 二级分类的具体品牌的内容-->
					<view class="cate-lv3-item" v-for="(item3,index3) in item2.children" :key="index3" @click="gotoGoodsList(item3)">
						<!-- 具体品牌的图片 -->
						<image :src="item3.cat_icon" ></image>
						<!-- 具体品牌的文本 -->
						<text>{{item3.cat_name}}</text>
					</view>
				</view>
			</view>
			</scroll-view>
		</view>

	</view>
</template>

<script>
		import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins:[badgeMix],
		data() {
			return {
				//记录设备的可用高度
				wh:0,
				// 左侧列表元素
				cateList:[],
				//用作激活左边的选项
				active:0,
				//这是二级分类的列表
				cateLeve2:[],
				//在更换二级分类使滚动条置顶
				scrollTop:0

			};
		},
		onLoad(){
			//获取不同设备信息
			const sysInfo=uni.getSystemInfoSync()
			// console.log(sysInfo);
			this.wh=sysInfo.windowHeight-50
			//获取左侧列表元素
			this.getCateList()
		},
		methods:{
			// 获取左侧列表元素的函数
			async getCateList(){
				const {data:res}= await uni.$http.get('/api/public/v1/categories')
				if (res.meta.status!==200) return uni.$showMsg()
				this.cateList=res.message
				//为二级分类赋值
				this.cateLeve2=res.message[0].children
			},
			activeChanged(index){
				this.active=index
				//动态地为二级分类赋值
				this.cateLeve2=this.cateList[index].children
				this.scrollTop=this.scrollTop===0?1:0
			},
			//跳转到商品列表页面
			gotoGoodsList(item3){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid='+item3.cat_id
				})
			},
			gotoSearch(){
				// console.log('ok')
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang='scss'>
	.scroll-view-container {
		display: flex;

		.left-scroll-view {
			width: 240rpx;
			.left-scroll-view-item{
				background-color: #f7f7f7;
				line-height: 60px;
				text-align: center;
				font-size: 12px;
				
				&.active{
					background-color: #ffffff;
					position: relative;
					
					&::before{
						content: '';
						display: block;
						width: 3px;
						height: 30px;
						background-color: #c00000;
						position: absolute;
						top:50%;
						left: 0;
						transform: translateY(-50%);
					}
				}
			}
		}
	}
	.cate-lv2-title{
		font-size: 12px;
		font-weight: bold;
		text-align: center;
		padding:15px 0;
	}
	.cate-lv3-list{
		display: flex;
		flex-wrap: wrap;
		.cate-lv3-item{
			width: 33.33%;
			display: flex;
			flex-direction: column;
			justify-content: center;
			align-items: center;
			margin-bottom: 10px;
			image{
				width: 120rpx;
				height: 120rpx;
			}
			text{
				font-size: 12px;
			}
		}
	}
</style>